TMZ has obtained video of a fight between VH1's 'Love & Hip Hop' star and "Black Ink Crew" bruiser Sunday night at Diddy's crib in Miami, as the two met up on the black carpet.

You see Rah say "hi" to Sky, and then act like she's going in for a hug ... before grabbing the back of Sky's head in an aggressive manner. Sky immediately starts hitting back, and the pair falls into Diddy's Ciroc backdrop before being broken up.

This ain't the first time the two reality stars came to blows -- they went at it in 2016 after getting into an Instagram beef about eyelash endorsements ... yep.